Then there's the giant temporary building it's constructing next to the Flint Center in Cupertino, California, where the event will be held. It's the same location Steve Jobs unveiled the Mac. The structure is big enough to fit a gymnasium.

Apple hasn't released a single new product this year, save for some minor updates to a few MacBook models. Instead, it's waiting until next week to start packing everything into the fall.

Based on media and analysts' reports, the company is expected to announce two new iPhones with bigger screens (one with a 4.7-inch screen and another with a 5.5-inch screen), a wearable computing device, and a mobile-payments system.

In terms of software, the iWatch will integrate heavily with new features Apple introduced in iOS 8. This includes HealthKit, which is Apple's new platform for storing health data. Handoff, the feature that makes it easier for different Apple devices to communicate, will also be a big part of how you interact with the iWatch.

The watch will come with a flexible display covered with sapphire glass, which means it'll be almost completely scratch-resistant.

The processor nestled inside the iWatch is described by Chen as "about the size of a postage stamp," which should help keep the device from being too bulky.

It will havea wireless charging method.

It will include near field communications, suggesting is will be capable of wireless payment.